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| Number | Title | Issue Date |
| 7338629 | Integrated metal processing facility A system and method for forming and heat treating a metal casting are provided. ... | 03/04/2008 |
| 7275582 | Methods and apparatus for heat treatment and sand removal for castings A system and method for heat treating castings and removing sand cores therefrom. The castings are initially located in indexed positions with their x, y, and z coordinates known. The castings are passed through a heat treatment station typically having a series of ... | 10/02/2007 |
| 7258755 | Integrated metal processing facility An integrated metal processing facility in which molten metal is poured into a series of molds at a pouring station to form metal castings, which are then transferred to a heat treatment line. Prior to introduction of the castings into a heat treatment station of th... | 08/21/2007 |
| RE39536 | Method and plant utilizing fine coal in a melter gasifier In a method for the production of liquid metal, in particular liquid pig iron (9) or liquid steel pre-products, from metal carriers, in particular partially reduced or reduced sponge iron (3), in a melter gasifier (1) in which with supply of a c... | 04/03/2007 |
| 7141205 | Method for discharging reduced product from a movable-hearth furnace and a discharging device A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating t... | 11/28/2006 |
| 6901990 | Method and system for processing castings A method and system of processing castings is provided in which one or more castings are deposited into a mobile furnace and moved from one station to another of a multi-station casting processing system. The interior of the mobile furnace is heated so as to maintai... | 06/07/2005 |
| 6858061 | Method and device for producing pig iron or liquid steel pre-products from charge materials containing iron ore The invention relates to a process for producing pig iron or liquid primary steel products in a blast furnace, CO2 being substantially removed from at least a partial stream of a top gas emerging from a reduction shaft furnace (1), and this partial... | 02/22/2005 |
| 6805723 | Method and reactor for production of aluminum by carbothermic reduction of alumina A hollow partition wall is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall divides a low temperature reaction zone where aluminum oxide is reacted with carbon to form aluminum carbide and... | 10/19/2004 |
| 6797034 | Method of producing reduced metals and apparatus for reducing metal oxides A method of producing reduced metals is disclosed in which a mixture of a metal oxide and a reducing agent is heated by a burner such that the metal oxide is reduced to a reduced metal. Dry-distilled gas generated during carbonization of an organic matter-containing... | 09/28/2004 |
| 6726875 | Combined installation for the treatment of steel work gases Steel work gases (blast-furnace gases, coke-oven gases, converter gases, etc.) are burnt with an exhaust gas from a gas turbine, optionally with a supply of natural gas and of air, in a combustion section between the outlet of the gas turbine and the inlet of a reco... | 04/27/2004 |
| 6648942 | Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus The invention is a method and apparatus for iron-making/steel-making using a modified rotary hearth furnace, that is a finisher-hearth-melter (FHM) furnace. In the method the refractory surface of the hearth is coated with carbonaceous hearth conditioners... | 11/18/2003 |
| 6589473 | Apparatus for manufacturing low-oxygen copper An apparatus for manufacturing a copper wire includes a melting furnace in which combustion is performed in a reducing atmosphere so as to produce molten copper; a holding furnace for maintaining a predetermined temperature of the molten copper supplied f... | 07/08/2003 |
| 6582492 | Method for producing melt iron The invention concerns a method for producing melt iron comprising the following steps: a) reducing the iron ore particles to form pre-reduced iron comprising excess free carbon; b) hot process transfer of the pre-reduced iron in a smelting furnace; c) sm... | 06/24/2003 |
| 6576040 | Process and plant with oxygen-enriched air feed for a non-ferrous metal production unit All of the air is compressed in a single compressor, which feeds a smelter for smelting ore, a converter for converting matte coming from the smelter and an air separation unit which delivers two oxygen streams for enriching the air. A buffer tank is used... | 06/10/2003 |
| 6551548 | Apparatus for producing reduced iron and compact drying An apparatus for producing reduced iron, and a compact drying method for application to the apparatus are disclosed. The apparatus comprises a pelletizer or a briquetter for mixing and agglomerating coal as a reducing agent and iron ore as iron oxide to f... | 04/22/2003 |
| 6491864 | Plant for charging metal carriers to melt-down gasifying zone Plant for charging metal carriers which contain a portion of fines and are at least partially reduced to a melter gasifier in which a melt-down gasifying zone formed by a bed is maintained, the metal carriers and carbon carriers are fed into the melter ga... | 12/10/2002 |
| 6482351 | Apparatus for producing reduced iron An apparatus for producing reduced iron dries agglomerates, pelletized from a powdery mixture of an iron oxide powder and a reducing agent, in a drying chamber, preheats the dried agglomerates in a preheating chamber, and then reduces the preheated agglom... | 11/19/2002 |
| 6440193 | Method and reactor for production of aluminum by carbothermic reduction of alumina The present invention relates to a process for carbothermic production of aluminum where molten bath aluminum carbide and aluminum oxide are produced in a low temperature compartment (2), and continuously flow into a high temperature compartment (3) where... | 08/27/2002 |
| 6416566 | Process for the production of liquid pig iron or liquid steel pre-products In the process for the production of liquid pig iron 943) or liquid steel pre-products from charging substances comprising iron ore (5) and fluxes and at least partially containing a portion of fines, the iron ore is directly reduced to sponge iron in at ... | 07/09/2002 |
| 6379423 | Device and method for producing sponge iron In a device for producing sponge iron from lumps of iron oxide in a reduction shaft (1), a hot, dust-containing and carbon monoxide-rich reduction gas is used. The reduction gas is generated in a gas generator by partial oxidation of solid carbon-containi... | 04/30/2002 |
| 6332911 | Method and plant of utilizing fine coal in a melter gasifier In a method for the production of liquid metal, in particular liquid pig iron (9) or liquid steel pre-products, from metal carriers, in particular partially reduced or reduced sponge iron (3), in a melter gasifier (1) in which with supply of a carbon-cont... | 12/25/2001 |
| 6319302 | Method for manufacturing reduced iron agglomerates and apparatus there for A method for manufacturing reduced iron agglomerates comprises the steps of supplying iron oxide agglomerates including carbonaceous material on a moving hearth, heating and reducing the agglomerates to yield reduced iron agglomerates while the moving hea... | 11/20/2001 |
| 6273934 | Method and an apparatus for producing metals and metal alloys A method of producing metals and metal alloys from metal oxides is disclosed. The method comprises the steps of partially pre-reducing the metal oxides to a pre-reduction degree of at least 60% in one or more pre-reduction stages. Thereafter, the method c... | 08/14/2001 |
| 6241798 | Iron smelting process and plant according to the multiple zone smelting process In order to be able to process in an economical manner different iron carriers in varying quantitative compositions, a plant for the production of iron melts (4), in particular steel melts, such as crude steel melts, is equipped with an electric are furna... | 06/05/2001 |
| 6224647 | Process and device for charging a fusion gasifier with gasifying means and spongy iron The invention relates to a device comprising a fusion gasifier and a reduction shaft arranged thereabove and for reduction of iron ore in spongy iron. The spongy iron is introduced through horizontal discharge devices in the lower section of the reduction... | 05/01/2001 |
| 6210463 | Process and apparatus for the continuous refining of blister copper Copper matte is processed to anode copper without oxidizing blister copper in an anode furnace. Copper matte, in either molten or solid form, is fed to a continuous copper converting furnace in which it is converted to blister copper and slag. The blister... | 04/03/2001 |
| 6183534 | Plant and process for the production of pig iron and/or sponge iron In a plant for the production of pig iron and/or sponge iron, comprising at least one fluidized bed reactor adapted to receive fine ore, a reducing-gas feed duct leading to said fluidized bed reactor, an off gas discharge duct departing from the fluidized... | 02/06/2001 |
| 6152984 | Integrated direct reduction iron system A system for producing directly reduced iron integrated with a turbine power generator and preferably a cryogenic air separation plant wherein off-gas from the direct reduction drives the turbine and preferably oxygen from the air separation plant is used... | 11/28/2000 |
| 6126717 | Steel-making method and plant A method wherein air is separated in an air separation unit (9), the oxygen thus generated is consumed during at least one step (2, 12, 13) of the steel-making process, the resulting gas is at least partially decarbonated, and the at least partially decar... | 10/03/2000 |
| 5997608 | Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process In a process for the production of molten pig iron or molten steel pre-products and sponge iron from charging materials consisting of iron ore and, if desired, fluxes, direct reduction of the charging materials to sponge iron is carried out in a fixed-bed... | 12/07/1999 |
| 5989308 | Plant and process for the production of pig iron and/or sponge iron A plant for the production of pig iron and/or sponge iron includes a direct-reduction shaft furnace for lumpy iron ore, a melter gasifier, a feed duct for a reducing gas connecting the melter gasifier with the shaft furnace, a conveying duct for the reduc... | 11/23/1999 |
| 5961690 | Process for producing molten pig iron of liquid steel preproducts and plant for carrying out the process In a process for producing molten pig iron or liquid steel pre-products, from particulate iron-oxide-containing material by fluidization, the iron-oxide-containing material is prereduced in at least one prereduction stage (7) by aid of a reducing gas and ... | 10/05/1999 |
| 5882579 | Apparatus for producing direct reduced iron utilizing a reducing gas with a high content of carbon monoxide A method and apparatus for producing direct reduced iron using a melter-gasifier and two reduction reactors. In the first reduction reactor, iron ore is prereduced using a reducing gas from a melter-gasifier. This prereduced iron ore is fed into the melte... | 03/16/1999 |
| 5858060 | Magnetic separation method for iron carbide A method for purifying iron carbide begins by feeding ore to a reaction chamber. A mixture of iron, iron oxides, gangue, and iron carbides is extracted from the reaction chamber. The temperature of the mixture is then adjusted to a range of 400°-500° C.... | 01/12/1999 |
| 5567379 | Method of producing molten pig iron or molten steel pre-products and a plant therefor A plant is provided for producing molten pig iron or molten steel pre-products from lumpy, iron-ore-containing charging substances. The plant comprises a reduction shaft furnace for receiving lumpy, iron-ore-containing charging substances, the plant inclu... | 10/22/1996 |
| 5535991 | Plant for producing molten pig iron or molten steel pre-products A process for producing molten pig iron or molten steel pre-products from charging substances formed of iron ores and fluxes and at least partially comprising fines, wherein the charging substances are directly reduced to sponge iron in at least one reduc... | 07/16/1996 |
| 5529291 | Circulating fluidized bed direct reduction system A method and apparatus for producing direct reduced iron from iron oxide fines. The iron oxide raw material is conducted through a series of circulating fluidizable beds in which the fluidizing gas is a strong reducing gas mixture, which allows intimate c... | 06/25/1996 |
| 5429341 | Apparatus and capsule for carrying out processes of directed crystallization, especially in cosmic space conditions The present invention refers to an apparatus and a capsule for carrying out processes of directed crystallization, especially in cosmic space conditions. The apparatus comprises a first compartment forming a multizone furnace having an inner surface divid... | 07/04/1995 |
| 5402990 | Steel making plant This invention provides a method and appratus whereby steel of various compositions may be produced from iron ore and coal through a series of stages without the intermediate production of liquid iron. A reforming reactor receives top gases from the steel... | 04/04/1995 |
| 5317862 | Air separation In a process integration, particularly with a blast furnace, nitrogen under pressure is moisturized by the addition to it of hot, pressurized water. The moisturized nitrogen is expanded and power thereby generated. The nitrogen is not mixed with combustio... | 06/07/1994 |
